being spontaneous and the urge jar

ok, so I am digging in deep with the urge jar and really want this to work and love it so far but how do I plan 24 hours when I really don’t have any idea where I will be or eat for dinner sometimes and/or on the weekends. This is of course when I have the most issues with urges and foods! I have 5 kids and at times get food on the go in the car or at my husband mom’s house and can make healthy choices but don’t know when or where. I can plan for the what if and know what I will eat if we go to a specific place as usually we do stick to certain places to eat with all the kids.

Also, how do I plan when my husband likes to eat whatever he feels like cooking and like to change my plan to have something else.